Unit5 Nature's temper. Section A Grammar Focus (4a-4d)教学设计2025-2026学年人教版八年级英语下册
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| U5 Section A(4a-4d) Grammar Focus | 课型 | 新授课 （语法） | 课时 | 4
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学习 重点难点 | 重点：掌握过去进行时与when/while引导时间状语从句的功能与用法；熟练运用was/were doing when/while...结构（含语境差异）完成语句和语篇填空；能在灾害经历交流中融入目标语法，准确表达动作同时性与先后性。 | |||||
难点：灵活区分when（动作先后）与while（动作同时）的语境差异；在语篇中自然运用过去进行时，实现语法与意义的融合；将目标语法结构迁移到自身防灾经历分享中，使表达既符合语法规则又贴合真实情境。 | ||||||
学习 目标 |
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当堂评价 |
2. 能够独立完成练习，when/while与过去进行时运用正确，语句通顺贴合“自然灾害”语境；两人一组，模仿主题创编至少3轮对话，语法运用准确，交流自然流畅；（检测学习目标2） 3. 能够在自身防灾经历分享中，正确使用目标语法，情节合理、表达流畅；能关联“敬畏自然、科学避险”主题，用when/while结构清晰表达应对过程与价值，体现语法知识的迁移运用。（检测学习目标3） | |||||
教学活动设计 | ||||||
学习活动 | 教师导学 | 学习评价 | ||||
Step 1. Lead-in. Observe the pictures of tornado signs (wall cloud, greenish sky, frequent lightning, funnel cloud, large hail, swirling debris) and watch the video. Discuss in pairs what they can do when they see these signs. |
Present the pictures of tornado signs and explain the meaning of each sign. Guide Ss to think about the corresponding preventive actions when these signs appear and share their ideas. |
师评。观察学生能否准确识别图片中龙卷风的迹象（如墙云、绿天空、频繁闪电、漏斗云、大冰雹、旋转碎片），并清晰解释每个迹象的含义；能否结合所学生词，用自己的话描述看到这些迹象时应该采取的防范措施。
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【设计意图】通过展示龙卷风迹象的图片并讲解含义，为学生提供直观的自然灾害知识素材，帮助学生建立对龙卷风特征的认知，为后续学习中理解台风、龙卷风等灾害的防范和相关语言表达奠定基础。引导学生观察图片并结合生活常识思考防范措施，将知识学习与实际应用相联系，拓展学生对自然灾害应对知识的储备。 | ||
Step 2. Presentation. Study the rules of the past progressive tense (formation, meaning, basic usage: actions in progress at a past time or over a past period). Analyze the examples and fill in the blanks in the given exercises. Read the sentences and distinguish the usage of present continuous tense, simple past tense, and past progressive tense. Fill in the blanks with “when” or “while” according to the time relationship between the main clause and the subordinate clause. Combine sentences using “when” or “while” according to the given examples. Complete the passage with “was”, “were”, “when”, or “while”. |
Present the knowledge about the past progressive tense, including its meaning, structure, and basic usage. Provide exercises and guide Ss to complete them, checking their answers and explaining the key points. Explain the differences between present continuous tense (action in progress now), simple past tense (action finished in the past), and past progressive tense (action in progress at a past time or over a past period). Guide students to analyze the time relationship in the sentences and choose the correct words or tenses. Ask Ss to finish activity 4b & 4c. Then check the answers. |
师评。观察学生能否准确说出过去进行时的含义、结构和基本用法，如是否清晰理解“过去某一时刻或某一段时间正在进行或发生的动作”这一含义，能否正确复述“was/were +动词-ing”的结构，以及区分其在“过去某一段时间内一直进行的动作”和“过去某一时刻正在进行或发生的动作”这两种基本用法。
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